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Reports classes without a constructor that takes no arguments (i.e. has no parameters).
No-arg constructors are necessary in some contexts. For example, if a class needs to be created using reflection.
<p><b>Example:</b></p>
<pre><code>
  public class Bean {
    private String name;

    public Bean(String name) {
      this.name = name;
    }
  }
</code></pre>
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<p>
  Use the checkbox below to ignore classes without explicit constructors.
  The compiler provides a default no-arg constructor to such classes.
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